Dynamics and Thermodynamics of the Low-Temperature Strongly Interacting Bose Gas
Résumé
We measure the zero-temperature equation of state of a homogeneous Bose gas of $^7$Li atoms by analyzing the \emph{in-situ} density distributions of trapped samples. For increasing repulsive interactions our data shows a clear departure from mean-field theory and provides a quantitative test of the many-body corrections first predicted in 1957 by Lee, Huang and Yang. We further probe the dynamic response of the Bose gas to a varying interaction strength and compare it to simple theoretical models. We deduce a lower bound for the value of the universal constant $\xi>0.44(8)$ that would characterize the universal Bose gas at the unitary limit.
Domaines
Gaz Quantiques [cond-mat.quant-gas]
Fichier principal
EoS_BosonsT0.pdf (180.96 Ko)
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EoS_BosonsT0_EPAPS.pdf (243.39 Ko)
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| Origine | Fichiers produits par l'(les) auteur(s) |
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| Format | Autre |
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